Research Article

Methylammonium Chloride Additive in Lead Iodide Optimizing the Crystallization Process for Efficient Perovskite Solar Cells

Figure 1

The surface SEM images of PbI2 films added different concentrations of MACl: (a) without MACl; (b) with 2 g/L MACl; (c) with 5 g/L MACl; (d) with 10 g/L MACl (scale: 5 μm).
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